from typing import List


from TreeHelper import *


class Solution:
    def buildTree(self, preorder: List[int], inorder: List[int]) -> TreeNode:
        return None


if __name__ == "__main__":

    visitTree(Solution().buildTree([3, 9, 20, 15, 7], [9, 3, 15, 20, 7]))
    visitTree(Solution().buildTree([1, 2, 3], [3, 2, 1]))
